Trembley started the year in that capacity, but began to be used more as a bench coach before being promoted to interim manager in early June. He was replaced on a temporary basis by former big league pitcher Bruce Kison, but Dunn will represent a full-time addition to the staff, one who already has Trembley's complete confidence.
"Alan was my pitching coach in Double-A for the majority of the time that I was with the Cubs," Trembley said. "He was the pitching coordinator this year [and] the pitching coach last year in Triple-A. He'll be a real good addition to our staff."
Trembley had such confidence in Dunn that he thought of him immediately when told that he'd be back next year. Shortly after Baltimore executive Andy MacPhail extended the offer, Trembley brought up the prospect of adding Dunn.
"The first person I asked for at that dinner meeting was Alan Dunn," he said. "With all due respect, we had a void in the bullpen. There's someone that needs to coordinate the program down there and have a pitching background.
"People that know the history of the Cubs and the pitchers they've developed there -- he's played a part in that."
Dunn coached in the Cubs' organization for 15 seasons, and three of his Double-A pitching staffs finished first or second in their league in ERA. He's filled every role from scout to coordinator to pitching coach but feels most at home on the field. Now, it's his job to fit in and try to help Trembley and pitching coach Leo Mazzone any way he can.
"To give me a chance to be here is a life's dream. For them to give me the opportunity, I'm very grateful to be here," Dunn said. "Basically, I'm going to do whatever's needed from Dave and Leo and try to be a complement to them in whatever areas they need me to work on. And hopefully, we can get some things going in the right direction."
Dunn will be stationed out in the bullpen, but he doesn't plan on doing much in his first few days. He wants to just be able to observe how everything works in Baltimore and ascertain exactly how he can be of service.
"Having been in the National League in the Minor Leagues and not really having a feel for the guys here, I think you have to come in and watch and listen and, obviously, talk to Leo and find out what he wants me to do," said Dunn.
Generation next: Trembley briefly discussed Radhames Liz on Saturday, talking about the youngster's arm hours before his scheduled Major League debut. That start was pushed back due to a rain delay, but Trembley said he was looking forward to seeing the hurler pitch. The last time Trembley saw Liz was during Spring Training.
"He's a power pitcher with a very good changeup and a slider that is two different kinds of breaking pitches," Trembley said. "He's been on a heck of a run. He's not walking people. Let's hope that continues tonight. I think it's just experience, maturing [and] success -- those things give you confidence. He's made a lot of nice progress in a hurry."
Fame game: B.J. Surhoff was inducted into the Orioles Hall of Fame before Saturday's rain delay, though the ceremony was shortened because of the oncoming rain clouds. In fact, Surhoff spoke at a lectern on the infield as a group of team employees frantically tried to remove anything that wasn't nailed down.
"I'm honored and humbled to be entered in your Hall of Fame," the former outfielder said at one point. "I loved playing the game each and every day for 19 years."
Trembley said he knew Surhoff vaguely since 1984, when they crossed paths randomly. Trembley was a field supervisor for the U.S. Olympic Committee, and Surhoff was a catcher for Team USA. They ran into each other again more than two decades later, when Surhoff was wrapping up his playing career and Trembley was managing at Double-A Bowie.
"He's still the same guy. The first time I came up here was September," Trembley said. "B.J. Surhoff, with me being a Minor League guy, went out of his way to not only make me feel welcome but to feel comfortable. The guy's a pro."
Quotable: "I appreciate that Mr. MacPhail allowed me to do that. I think you have to have people that have the same attitude and philosophy that you have. That's not to say that other people don't, but I know Alan Dunn. I know him very well." -- Trembley, on being allowed to name a member of his coaching staff
Coming up: The Orioles and Twins will meet for a series finale on Sunday at 1:35 p.m. ET, a game that pits staff ace Erik Bedard against Minnesota's Scott Baker. Bedard has won nine straight decisions and hasn't lost since June 10.
Spencer Fordin is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.